Compound kesonatob



June 22 1926. Re, 16,367

c. A, VALENTINE COMPOUND RESONATOR Original Filed Nov. 23, 191

2 Sheets-Sheet 1 g 42 4? Tiq.5.

TORNEYS June 22, 1926.

R 16,367 0. A. VALENTINE COMPOUND RESONATOR Original Filed Nqv. 23, 19162 Sheets-Sheet 2 Ti q.%

fi, INVENTOR ./0 {WM 4 WW1? Patented June22, 1926.

marries sea-res uisine a vhmm'rmn nion rs. remotes-sesame, iars,serial); 189,581, iue'a some, at, 1915. Application for'reisiue ma ember31; 1920. swarm. 418,0;

* My inventiofn' relates to improvementsin compound resonators; anditsobject is to provide asimple andeflieient device which is" extremelresponsive to sound vibrations, which is capable of effectivelyaugmenting such vibrations, and which is, adapted to clarify the tonesor sounds emitted, separating' ssch tohes br insneh manner asmeasures-grease wraaistinemess without less oftohal va use wasm f h r ae is I a sor'other device; m ying mgm gtie action, "may be usediriconnection with other Mieeswhere r isdesi rfible to clarify and aumentithe n inventionfiniay'be thore 1 anemones foliowing-spe cifiea tion,and then point out the novel features thereof in appended claims.

Referring the drawings:

"""Fi'gured is a-seetional side elevation of an amplifying-fibril,provided with a pluralit'y-of compound "resonators, which are madeaccording to and embodying my invention.

Fig". 2 'is a plan view, and F 3 a front elerhtioir ofone of thfecompcun resonators shown in Fig. I. V

In'Fig; 4,1 have shown, in plan view, a modified of resonator, whichalso emmin-venom. Fig. 5 is-a front ele'vation of the form 'of resonatorwhich is shown in Fig.4. I

Fig. 6 im setiohill' side elevation of another for-mot resonator,whi'ehis alsomade aeeordingto thi's invention.

Big? is a perspective view of another modificatienofconstruction, and

Fi -L18 i's'fa sectional front"-ele'vationofa stiH Eurther maimedstructure, embodying the same invention;

Lik'eharaebers of 'refirenee desighate corresponding arts in all thefigures;

1o flesi use fiat'board of-'thin wood, or other vibrating material, uponwhich the other parts of the apparatus are mounted. 11 are sugportingbridges, which, in the structure s own in Figs. 1, 2 and 3, runlongitudinally across the center of the board 10,

on opposite sides thereof. Across the outer surfaces of these bridges,and disposed transversely in relation therewith, are a plurality pfparallel Ybfl$9 l?! 0!???919 9:

talking machine (not shown);

are e'lampihg strips 13 and all of these parts we held togetlle'rhgidiyby through bolts 14.

The vibrators 12 are preferably constructed of thin strips ofmaterialsen'sitive to vibrations, such for example, a wood carefullyseasonedv and repaired for this purpose. These'far'e ofidi erentdimensions so as to berespoiisi'vb eaoh to vibrations ofdifiereht-ffifequcticiesk caveman mfehns for-marnisgcm resultis to makethem of p In; Fig. '1, four of these improved 'co'ntrresonators are inan amplifying hm, ehamber 20 'of a ham suitable for nsein conjunction'wirh'a phonograph or At -the smaller we sum ho 'i asin a roehaecl byfiiine *,"by "mea ns oi which the? horn 'inaybailiie toa similar frame28 at themouth of an ads te'r 24, the other end of which maybe a we tothe sound emitting opening bf a: phbnograph or The sound vibrations passthrough an opening between two 'deflle'ctors 25, but some 0 26""of thehorn, which them so that they pass out through the mouth of the horn.Thus;- the sound vibrations pass through different paths throughth'horn, so that a plurality of my sosndmg boards may be used to 'advahtagewith a horn. V

This eonstruct-idmhowever, inlay be widely varied, without'dbpirtingfrom the invention.

I haveifouhdyin practice,"thiit carefully them are defle btd'tdthecurved surfaces seasoned'w'ood secures, by far,- the best resuits of anymaterials with which I am acquaint-ed. They introduce no deleteriousvibrations of "their-own, sneer-e singularly res" sire mum imfiegsedvibmi n ama a d i my. e sneer? steal-hum the foregoing neseiiption. Thevibrators 12 are-sac robably at least some of them are indepen entlyresponsive to diflerent frequencies. When the device is placed in thepath of musical or other sounds, the vibrators are set in motionthereby, and tend to lengthen, sustain and augment the vibrations of theimpressed sound waves. There is also a very notable clarifying efiect,parwas; is t as t the lki machine queney, and

responsive a one -fr-' or other similar devices, the various vibrationsproduced at the diaphragm being clarified to such an extent that thereis a very marked improvement in the clearness of tone emitted and theelimination of the jumbling or confusion of sounds produced at thediaphragm, or between the diaphragm and the vibrators, due todiaphragmatic or other action setting up spurious or added vibrationsnot present in the original production.

The mounting of the vibrators upon a sounding board, such as the baseboard 10, is of importance, since this not only augments the volume ofsound, butalso aids in its clarification. It is also important that thevibrators should have a ri id connect'ion with the sounding board of aseboard, and that the vibrators, individually, should be rigidly connectedthereto.

By mounting a series of resonatorsvof different dimensions ordifl'erently tuned upon a sounding board or its equivalent in the pathof the sound vibrations, all of the resonators become more sensitive tothe vibrations, and they and the sounding board produce a series ofovertones which supply the loss of overtones which occurs throughpresent methods of reproducing.

As the vibrators are tuned to definite periods of vibrations, preferablyall within the range of audibility, there is another important functionperformed by them, in that certain undesirable irregular vibrations,such as those produced by the scratch of a phonograph needle, are notaugmented, so that, in efi'ect, they are proportionately reduced oreliminated.

In the structure shown in Figs. 4 and 5,

l 10 designates the base board. In this case,

. secured to the bridges by the bridges 11 are set along the oppositeedges of the board. The vibrators 12 are means of clamping strips 13 andthrough bolts 14", as in the previously described construction, but inthis case, each is secured near one of its ends, so that a separatepiece is required for each vibrator.

The operation of this embodiment of my invention is so similar to thatpreviously described, that it would be superfluous to repeat adescription of it.

It is obvious that the base board need not be plane, but that myinvention is applicable to a parabolic or curved sounding board such asthat shown at 10" in Fig. 6. In this case, the bridge 11, and theclamping strip 13 are curved to conform with the shape of the base board10". The vibrators in this figure are designated 12".

In the structure shown in Fig. 7, the base board 1O is plane, and thebridge 11 is placed across its surface. The vibrators 12 are heldbetween the bridge and the clamping strip 13, but, in this case, theyare placed edgewise with relation tothe board 10 instead of flatwise, asin other cases. These vibrators have much the same operation as thatdescribed in connection with the structure of Figs. 1, 2 and 3.

In the structure of Fig. 8, a plurality of rows of parallel vibrators 12are shown between bridges 11 and clam ing strip 13", held together andto base oard 10 by through bolts 14.

I have illustrated and described several structures embodying myinvention, to show that it is not limited to any specific constructionor use, but that it is in fact capable of wide variation withinitsspirit and scope. In fact, I intend no limitations other than thoseimposed by the appended claims.

his an important, although not essential, feature of the invention, thateach of the vibrators be made as an independent unit, so that it may becapable of vibrating freely, without necessarily involving the vibrationof others.

What I claim is l. A device for reproducing sounds, having a chamberadapted to receive sound waves set up by a diaphragm and a base boardand wooden vibrators connected with said base board and mounted in saidchamber to be acted upon by such sound waves.

2. A device for reproducing sounds, having a chamber adapted to receivesound waves set up by a diaphragm, means for leading said sound waves tosaid chamber, and flat vibrators arranged .in said sound chamber andmounted in the path of said sound waves.

3. -A device for reproducing sounds, having a chamber adapted to receivesound waves set up by a diaphragm, means for leading said sound waves tosaid chamber,

and flat vibrators arranged in said sound chamber and mounted in thepath of said sound waves, and a sounding board upon which said vibratorsare mounted.

In witness whereof, I have hereunto signed my name.

CHARLES A. VALENTINE.

